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Food Habits of Two Fork-tailed Swifts in Venezuela

2012; Wilson Ornithological Society; Volume: 124; Issue: 1 Linguagem: Inglês

10.1676/11-051.1

1938-5447

Charles T. Collins, Betsy Trent Thomas,

Fish biology, ecology, and behavior

The aerial arthropod prey of Neotropical Palm Swifts (Tachornis squamata) and Lesser Swallow-tailed Swifts (Panyptila cayennensis) in Venezuela included seven Orders and 60 families of insects plus spiders and mites. Diptera were the most numerous prey (>50%) taken by both swifts. Prey size ranged from 0.5 to 7.9 mm and averaged 2.43 and 2.77 mm, respectively. Both prey type and foraging habitat differences of these swifts could be interpreted as mechanisms for resource partitioning.